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A Message from the Treasurer-Tax Collector

The Treasurer-Tax Collector’s Office proudly serves the residents and taxpayers of San Joaquin County. Our mission is to ensure the safekeeping of public funds while maintaining liquidity and maximizing earnings in a conservative and prudent manner. We strive to provide the highest level of service in a professional, courteous, and efficient manner as we collect taxes and revenues critical to local government operations that benefit San Joaquin County and its citizens.

To better serve you, please use our chatbot located in the lower-right corner of the webpage. Thank you for visiting our website.


Phonxay Keokham, CPA
Treasurer-Tax Collector
San Joaquin County

Phonxay

Treasury

Providing banking and investment services to County departments, schools, and special districts, we oversee bank relationships and manage the investment pool in a prudent manner ensuring safety, liquidity, and a return on investment on public funds.
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Tax

Overseeing the property tax billing and collection process for secured and unsecured property taxes levied by California state law, we assist the public in understanding their property taxes and making payments. We also issue business licenses in unincorporated County areas.
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Revenue & Recovery

Collecting monies owed to the County and court ordered fees, fines, and restitution, we provide billing and collection services, make payment arrangements, and take appropriate legal action to make our clients and victims whole.
More About Revenue & Recovery
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Public Auction

March 11-12, 2026

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Important Dates

10 Dec

Secured Taxes First Installment Delinquent Date

December 10, 2025

Last day to pay the first installment of secured taxes without penalty. If it falls on a weekend or legal holiday, the delinquent date is the next business day.

11 Dec

Last Day to File an Exemption Claim for Homeowners and Veterans to receive 80% of the Exemption

December 11, 2025

Last Day to File an Exemption Claim for Homeowners and Veterans to receive 80% of the Exemption. If it falls on a weekend or legal holiday, the Last Day to File an Exemption date is the next business day.

11 Dec

Last Day to File an Exemption Claim for Disabled Veterans to receive 90% of the Exemption

December 11, 2025

Last Day to File an Exemption Claim for Disabled Veterans to receive 90% of the Exemption. If it falls on a weekend or legal holiday, the Last Day to File an Exemption date is the next business day.

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